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Having or showing excessive and arrogant self-confidence; presumptuous.

pre·sum′ing·ly adv.
References in periodicals archive ?
Without the leadership of captain and towering defender Liam Hogan, left on the bench and presumingly on his way out of the club, the Heed struggled.
Despite much persuasion from the generals and Consort Yu, his beloved concubine, Xiang Yu presumingly led the army to Jiulishan Mountain.
Despite a thoroughly convincing performance by Elliot, Tilghman is just too white-hat-good and Wiley too fulsome a foe, without pauses along the way or narrative twists that could deepen Harrison's presumingly accurate version of history.